I have a release pipeline to deploy my ASP.NET MVC web app to Azure VM. I have configured the release pipeline and everything was working fine.
But all of a sudden, it started throwing the error shown here. I am using IIS Web App deployment tool for this in Azure DevOps:
Looks like it's been reported as an issue related to a new task versions for WebAppDeployment tasks. See here, you might find a workaround that will work for you: https://github.com/microsoft/azure-pipelines-tasks/issues/17634